Coaster-brake.



0. C. WATKINS.

.l I 1,139,090. Patented May11,1915.

' OWE/V IMITKHYSJ Inventor,

Witnesses:

. own! Msfidwy v L17 9 8F QNEKHZRD T6 THOMAS E.

npplimtion filed August 24, 1914.

To all vi/ 40m it may concern lie it, known that I Own? 1'' ll): {lni'uwl 7 run. im tler coin. r l certain new and n in Cousin-Broken, of is a specification This inrewion, P -l merits in CGHSIG! bru hiring to lentur brakes will for iin r will be Ain'iily uni! ription o accompanying Figure 1. is i of my illlpflfl'ii'i i. taken the phi iignree; it is :1 tion in ll e plane oi. is 2). er r 31 trinisvurse v of line nit Fig. l; and F1 one end of the l'rraliie-slecvo.

In the drziwingz-L irniliiiietcis'. the u; rear fork-nienibirs; 2, the male seer therein as usual; 3, the hub surrounding axle; l, the spokes; 5, ball bea. -n 5 the cylindrical bore of the hub, concentric n'i the 1: lo; 7 the sprocket, loose on the rule at one end of the hub; ahose projecting inwardly from the sprocket and loose into 21 soon bore formed in the contiguous end of the hub; 9 ratchet teeth on the periphery of this hi, these teeth facing in the bree tion of forward rotation, that to say, facing forward as the sprocket turns lor- 11rd, as indicated by the :1 rrox-vs in Fi fs- 1 and 2; l0, pawls Carri-en the hub :inn cooperating with teci 7) the ill ustrntion showing the hub liming provided with three of these pnwls teeth 9 and puwls 1O typifying a well known form of mechanical movcment, for hicl there are many well known equivalents. for causing one rot: ting member of u couple to enforce rotation upon the other rotating mernbcr of the couple in. one ilireclion only; 11. u longitudinally split brake sleeve having its periphery engaging bore 6 of the hub, norn'mlly with loOscncSS or with such (la-giro of loosencss :is-will permit the hub to rotate free y upon the hrzelre-elim c, this broker-alcove extending substnniiully the entire length of the bore of the hub; 12, a tongue and roore arrangement of one coil of the l rulic lceve, coiiperuti. heir n he brake-sleeve un l' lilac mile to prevent the in tut-ion of the brake slee'vc the illustration ation of Latte n-item or? May 1 '1 191 Serial KTo 558,187.

a and groove arrange grooves in the n l of the brake ulcer incl cooperating tongues "l b ii bellbenring niwn'ibcr f t on tho uric thieand. grroi'e an": increment n typi ing means for securing the against rotation; 13, an elliptic unlit brake SlQ'Z'VQ; 1L an elliptic ment as being for y n the elliptic bore of the hrzilie 7 1 and extending throughout the major cort on of the length of that bore, one end of this can inning :1 circular portion projecting into a counter-bore in the inner face of ho 5:, 1?), ratchet-teeth formed on the cylimlncul end of com 14, these teeth facing n the sumo direction as ratchet-teeth 9 on he boss of the bprocliet; and 16, pawls careri boss; of the sprocket and coi'i'p'oratact teeth 15 of the can; the ition showing three or" these pawls, pliwlx and teeth Lypifying lIlQzifiS by which the boss may e owe the rotation of the cum in one (life I u only lv'hen. the s roch liar in the direction of the arrows, as canned by the usual forward pedaling, the fez-til on hos flungrnre one or more lidYlf: i0 and enforce the forward tiirmn of the wheel, tlHIFT nropelling the bicycle in the forward (lirr 'on In this operution of the mr'ts piiwls ll; click ivlly over teeth 15 on the 'll'l0llfll'Y cam. If while the bicycle is lllflfli'l forwz'ir'zl, the motion of the sprocket be ii-routed. by the cessation of pedaling, then the hub and it? wheel continues to run in the fori'vuril (lirec tionl pawls l0 clicking idly ore-r tooth 0. the bi ycle then counting. In this opczul'ion the spnickct :iinl cam are stationhry.

If, hile the bicycle is counting; or-even While it is being propelled f rward by the pmlaln, the sprrmket be turned s3 :htly in a direction the reverse of the arrows. by buck pmlnling. then one or more oi perils 16 will engage teeth of the cum and partially rotate the cum on the axle. This, results in the exmneion of the split brake swore, causing it to frictionully engznz'u the bore of the hub and, is the brake slvmc cannot rotate, to bring); into action th brake formed by the periphery of the bra e sleeve. In this connection uttcni' an cullcrl to the simplicity of the structure. to the avoidance of par-ts moving cnalwiav of the axis of the hubfl i periphery ca 1 1 l.

Wearing "oi-med hy the of the lo!) 1 I chaini:-- 1. A eomter h";

nxprising, an axle, Q Hi pi'midmi With :1

l l f ienetn oi the nnh.

mgmneni with Sllld Int-HY mnoeting the pruhet with the hub and aztiapted to crime the turmng of the sprocket in the turn a direction to enforce the turning of the huh in the same direction while permitting the huh to turn forward freely in rehztion to the sprocket, and means connecting the sprocket with the cum to cause the sprocket to turn the cam when the sprocket is turned in huekward direction and to permit the. sprocket to turn freely relative to the cam when the Sprocket turns in the forward direetion. combined substantially as set forth.

A oeeeter hrake eonn'n'isii'ig, r 121! forkmemhers, an axle fixedly carried thereby, bail-hearings. carried hy the axle, a hub surrounding; the axle and supported by the hullhezn-ings and having a cylindrical brakehore extending through it and having a counterhore at one end of the hrake-hore, a sprocket loose on the axle at the counterhored end of the huh, a boss projecting from the sprocket into said'connterhore, ratchetteeth formed on the periphery of the boss, penis carried by the hub and adapted to he engaged hy said ratchet-teeth to propel the huh in the for md direction when he sprocket turns: in the forward direction, a split hral e-sleeve fitting the bore of the hub and having an elliptic here, means for preventing the turning of the brake-sleme relative to the axle, a earn mounted for rotation on the axle and extending substantially the full length of said hrzilto, sleeve and having a periphery adapted to eoiipemte with the elliptic bore of the brake sleeve, rateh t-teeth carried by the end of the cam nearest the sprocket and facing in the same direction as the first mentioned ratchet-teeth, and pawls ear-flied hy the boss and adapted to engage the ratchet-teeth of the cam and turn the cam in backward direction and expand the hrakeeleeve when the sprocket is turned in lmekward direction, combined substantiall y as set forth.

OWEN C. VATKINS. Witnesses ALLEN S. FINZEL, J. L. \VAL'IE. 

